IMSI Analysis Arieso

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IMSI Analysis

Claro Brazil Workshop April 5th, 2013 Dalia Guzman www.arieso.com

IMSI – Use Case A VIP user has experienced a voice drop, and you have been requested to analyse the event, in order to provide a solution...

What to do?

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IMSI – Details & Filter for analysis The details below are related to the voice drop. Create a filter for accordingly for your analysis:

• When

– 02/04/2013 @ around 11.00 AM

• Use Time Period filter for April 2nd, from midnight to midnight. Please beware that in the filter you have to use month/day/year, e.g. April 2nd is 04/02/2013.

• What

– CS Drop

• Where

– Since we are filtering by IMSI, there is no need to filter by region, as IMSI

normally would act on a very closed area. • However, a good practice is to choose the Geographic Area filter option“Use Bounding Box”.

• Who

– IMSI 724053908407878

• Use Subscriber filter for above IMSI Copyright Arieso 2013

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IMSI – Individual Call Segments We can use this analysis to find all calls that have been done by that user we want to check. It gives us some information, like “start reason”, “completion”, “cell”, etc. TASK – Please run the analysis, and once you have the output table, please identify relevant information (IMSI, drop call, sector it was connected to, the type of service, and the reason for disconnection).

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IMSI – Individual Call Legs with RF Conditions We can use this analysis to find all calls that have been done by that user we want to check. It gives us some information as previous analysis, and also RSCP, EcIo, UE Tx power for that specific call segment. TASK – Please run the analysis, and once you have the output table, please identify relevant information (IMSI, drop call, sector it was connected to, the type of service, and the reason for disconnection, RSCP and Ec/Io of the specific call segment).

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IMSI – Subscriber Comparison We can use this analysis to compare the behaviour / KPIs of different IMSIs (or show the KPIs of just one), in a period of time. TASK – Please run the analysis, and once you have the output table, identify the main KPIs for this subscriber. Is his Drop Rate too high? What about number of drops, during the filtered period, is it a high number of drops?

This is a good analysis also to study the performance of (a) specific subscriber(s), for greater periods of time. For example, how was the general performance of this subscriber during last month? You may also know which are the offender cells by running the analysis on next page… Copyright Arieso 2013

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IMSI – Drop Locations Inside the points folder, we can find the drop locations analysis. With this we can plot all locations for a specific IMSI for the drops. Once we located the drops in the map, using the spider tool we can drilldown each call TASK – You may use this analysis as well to find out if there are other subscribers experiencing drops in the area (same map boundings of ~1 km around the drop and apply a new filter with it, removing the subscriber and extending the Time Period for 20 days, for example). Is this an area with lot’s of drops? Or is this a single event? What to do in each case?

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IMSI – Drop Locations / Call Spider In the first tab of the spider, we can see all properties of the call: IMSI, IMEI, start time, service, etc.

TASK – Please